. >>> in 2007 a law banned smoking in enclosed environments. researchers say before the law took effect the number of children hospitalized with asthma systems have been growing by 2.2%. within 12 months after the law was in place, hospitalizations fell 12%. >>> the president has something going into his second term that he didn't have in his first, a graying head of hair. you can see these two portraits. the one on the left was in 2009 and the one on the right was last month. doctors say stress is to blame for a condition that cause as person to lose his hair and when it grows back it becomes gray. >>> why some people turned in their weapons after the money ran out. >> cooler weather is headed to the bay area, what you can expect for tomorrow and when you may need the umbrella coming up. >>> court papers endicate a teen was -- indicate a teen was annoyed with his mother before killing his family saturday. the information came in a statement filed ahead of the teen's court appearance tomorrow. investigators say he shot his parents and three sib